• Project

I-5 - NB Seneca to SR 520 - Mobility Improvements

Project overview

To improve mobility on I-5 through Seattle, we will move barrier on a 1,500-foot section to create three through lanes near Seneca Street, add ramp meters for the Dearborn/I-90 and Cherry Street on-ramps and extend the Active Traffic and Demand Management system north to SR 520.

Spring 2021 - Fall 2023
Project status
$37.6 million

What to expect

The northbound I-5 collector/distributor will be closed nightly from 11:59 p.m. Wednesday, Aug. 30, to 4 a.m. Friday, Sept. 1 for construction. The northbound I-5 off-ramps to James and Madison streets will be closed. The Dearborn Street and I-90 on-ramps to northbound I-5 also will be closed. 

When both the collector/distributor and mainline I-5 are closed, the express lanes will remain open northbound, but the first express lanes exit is NE 42nd Street in the University District. People going to downtown Seattle should use the Edgar Martinez Drive exit or take eastbound I-90 to Rainier Avenue.

Specific information is available on our real-time traffic map.

Work between Yesler Way and SR 520 will add a short section of a third lane between Seneca Street and the Washington State Convention Center, ramp meters at the Dearborn/I-90 and Cherry Street on-ramps and extend the Active Traffic and Demand Management system.